1. the iron carbide constituent of steel and cast iron; very hard and brittle. 
   铁的碳化物，组成钢和铸铁，极硬极脆。
2. A nonmagnetic solid solution of ferric carbide or carbon in iron, used in making corrosion-resistant steel. 
   奥氏体一种非磁性的固状可溶性含铁碳化物或含碳铁，用于制作不锈钢
3. a solid solution of ferric carbide or carbon in iron; cools to form pearlite or martensite. 
   含铁碳化物或含碳铁的固体溶体，冷却可形成珠光体或马氏体。
4. Iron bars; an iron alloy. 
   铁棒；铁合金
5. plate iron thinner than tank iron. 
   比坦克钢板薄一些的钢板。

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